Summary: CTFE rejects static array to dynamic array casts
           Product: D
           Version: 1.043
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: patch, rejects-valid
          Severity: normal
          Priority: P2
         Component: DMD

Test case:

char[] foo(char[] source) { return ""; }
const v = "bar";
const r = foo(v);

Error: cannot evaluate foo(cast(char[])v) at compile time

This works in D2 because of changes to Cast in constfold.c. LDC backported the
changes by adding this code from the D2 frontend:

    if (e1->op == TOKstring)
    if (tb->ty == Tarray && typeb->ty == Tarray &&
        tb->nextOf()->size() == typeb->nextOf()->size())
        return expType(to, e1);

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